Synthesis of Benzoxazoles by an Efficient Ullmann-Type Intramolecular C(aryl)-O Bond-Forming Coupling Cyclization with a BINAM-Copper(II) Catalyst
作者:Govindasamy Sekar、Ajay Naidu
DOI:10.1055/s-0029-1218589
日期:2010.2
benzoxazoles were synthesized from the corresponding N-(2-iodophenyl)benzamides through intramolecular C(aryl)-O bond formation via Ullmann-type coupling cyclization in the presence of a catalytic amount of an easily available BINAM-copper(II) complex under very mild reaction conditions (82 ˚C). Less reactive bromo and chloro analogues of the N-(2-halophenyl)benzamides were also successfully cyclized